Brief

"On March 15, 2023, CISA released the Microsoft Expanded Cloud Logs Implementation Playbook. This step-by-step guide enables technical personnel to detect and defend against advanced intrusion techniques by operationalizing expanded cloud logs in Microsoft Purview Audit (Standard). The playbook provides an overview of the newly introduced logs, details analytical methodologies, and discusses significant events in other M365 services."

Today, CISA released the Microsoft Expanded Cloud Logs Implementation Playbook to help organizations get the most out of Microsoft’s newly introduced logs in Microsoft Purview Audit (Standard). This step-by-step guide enables technical personnel to better detect and defend against advanced intrusion techniques by operationalizing expanded cloud logs.
The playbook details analytical methodologies tied to using these logs. Specifically, the playbook offers:

An overview of the newly introduced logs in Microsoft Purview Audit (Standard) that enable organizations to conduct forensic and compliance investigations by accessing critical events (e.g., mail items accessed, mail items sent, and user searches in SharePoint Online and Exchange Online).
A description of administration/enabling actions and ingestion of these logs to Microsoft Sentinel and Splunk Security Information and Event Management (SIEM) systems.
A discussion of significant events in other M365 services, such as Teams.

CISA encourages organizations to use the playbook to make newly available logs an actionable part of their enterprise cybersecurity operations.

Highlights content goes here...

Purpose
The primary objective of releasing the Microsoft Expanded Cloud Logs Implementation Playbook is to provide a step-by-step guide for technical personnel to operationalize expanded cloud logs, enabling organizations to detect and defend against advanced intrusion techniques. This playbook aims to help organizations get the most out of Microsoft’s newly introduced logs in Microsoft Purview Audit (Standard). By utilizing these logs, organizations can conduct forensic and compliance investigations, gaining critical insights into events such as mail item access, sending, and user searches in SharePoint Online and Exchange Online.

Effects on Industry
The release of this playbook is expected to have a significant impact on the cybersecurity industry. Organizations will be able to operationalize expanded cloud logs, enhancing their ability to detect and respond to advanced threats. This, in turn, will improve overall enterprise cybersecurity operations and compliance posture. The increased use of these logs will also lead to more effective forensic investigations, enabling organizations to better understand and address security incidents.

Relevant Stakeholders
The Microsoft Expanded Cloud Logs Implementation Playbook is relevant to various stakeholders, including:

  • Organizations that utilize Microsoft Purview Audit (Standard) and other M365 services
  • Technical personnel responsible for implementing and managing cybersecurity operations
  • Compliance and risk management teams seeking to enhance their forensic investigation capabilities
  • Security professionals looking to improve their incident response and detection capabilities

Next Steps
To fully benefit from the release of this playbook, organizations are advised to:

  • Review the provided analytical methodologies and implementation steps
  • Assess their current log ingestion and analysis processes in Microsoft Sentinel and Splunk SIEM systems
  • Update their existing security protocols to incorporate the newly available logs from Microsoft Purview Audit (Standard)
  • Implement the recommended changes to enhance their forensic investigation capabilities

Any Other Relevant Information
It is essential for organizations to note that the playbook is not a one-time implementation guide but rather an ongoing process. Regular updates and refinements will be necessary as new features are introduced or existing threats evolve. CISA encourages organizations to stay informed about future developments in Microsoft’s cloud logs and related security capabilities, ensuring they remain proactive in their cybersecurity posture.

Cybersecurity and Infrastructure Security Agency

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